/**
 * #      1359
 * 名称   有效的快递序列数目
 * 链接   https://leetcode-cn.com/problems/count-all-valid-pickup-and-delivery-options
 * 题解   [57](https://leetcode-cn.com/problems/count-all-valid-pickup-and-delivery-options/solution)
 * 通过率 54.5%
 * 难道   困难
 */

